The emblematic part of Renaud Bonzon's work is surely the rocking-chair "Gaivota", probably the most rewarded creation in Brazil, combining at the same time aestheticism and ergonomics. The curved forms of both seat and back were defined by Renaud Bonzon, as he was sat in deep snow during a stay in French Alps and had a look at his bodyprint after standing up. Keeping ergonomics in mind, Renaud wanted to reproduce this form. He paid a special attention to both dimensions and balance making this rocking-chair very comfortable whatever the user size. For the sake of environment he chose the plywood manufacturing process in order to give value to wood trimmings. Furthermore this process allowing the creation of large curves, Renaud took advantage of this property to introduce the movement in his creation. The design of the rocking-chair, its sinuous curves, irrevocably reminds the movement even statically represented on a picture. Elegance and comfort characterize the Gaivota.